$\left(+6\right)x\left(+2\right)$
$\int\frac{4}{x^2-1}dx$
$\frac{cos^2}{cos^2}$
$5-20\cdot10^{-6}<2$
$\frac{1-\sin x^2}{\cos x^2}$
$\frac{\left(10-7w\right)}{\left(-3w-4\right)}<=2$
$11cos^2x+cosx-12$
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